* {
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
}

#frame {
    position: relative;
    width: 100%;
    height: 500px;
    overflow: hidden;
    border-radius: 5px;
}

#photos img {
    float: left;
    width: 33.33333%;
    height: 500px;
}

#photos {
    position: absolute;
    z-index: 9;
    width: calc(100% * 3);
    /*---修改图片数量的话需要修改下面的动画参数*/
}

.play {
    animation: ma 10s ease-out infinite;
}

@keyframes ma {

    0%,
    30% {
        margin-left: 0px;
    }

    35%,
    60% {
        margin-left: -100%;
    }

    65%,
    100% {
        margin-left: -200%;
    }

}

.play div div {
    border: 1px solid black;
    width: 150px;
    height: 35px;
}

.play div:nth-child(1) div {
    border-color: white;
    color: white;
    position: absolute;
    top: 50%;
    left: 5%;
}

.play div div a {
    color: black;
}

.play div:nth-child(1) div a {
    color: white;
}

.play div div a {
    position: absolute;
    top: 20%;
    left: 30%;
}


.play div:nth-child(2) div {
    position: absolute;
    top: 65%;
    left: 40%;
}

.play div:nth-child(3) div {
    position: absolute;
    top: 60%;
    left: 72%;
}
.div3_b div:hover,
.div2_a:hover,
.play div div:hover {
    border-color: red;
    background-color: red;
}







body>h2 {
    text-align: center;
    position: relative;
    top: 20px;
}

body>h2::after {
    content: '____';
    color: red;
    position: absolute;
    left: 48.55%;
}

.div2 {
    width: 100%;
    height: 640px;
    position: absolute;
    top: 250%;
}

video {
    position: absolute;
    top: 0%;
    left: 0%;
    width: 100%;
    /*加滤镜*/
    /* filter: blur(15px);  */
    /* -webkit-filter: grayscale(20%); */
    filter:grayscale(20%); 
    z-index: -11;
}

.div2>img {
    position: absolute;
    top: 0%;
    left: 0%;
    width: 100%;
}

.div2>div {
    position: absolute;
    top: 10%;
    left: 60%;
    color: white;
    height: 300px;

}

.div2>div>h2 {
    font-size: 35px;
}

.div2 h2::after {
    content: '________';
    color: red;
    position: absolute;
    top: 25%;
    left: 0%;
}

.div2>div>div:nth-child(2) {
    position: absolute;
    top: 50%;
}

.div2_a {
    z-index: 99;
    border: 1px solid white;
    width: 150px;
    height: 35px;
    position: absolute;
    top: 70%;
}

.div2_a a {
    color: white;
    position: absolute;
    top: 19%;
    left: 27%;
}


.div3 {
    width: 80%;
    height: 600px;
    position: relative;
    left: 10%;
    top: 1850px;
}

.div3 h1 {
    text-align: center;
}
.div3 h1::after{
    content: '____';
    color: red;
    position: absolute;
    top: 1%;
    left: 48%;
}

.div3_a{
    position: absolute;
    top: 11%;
    width: 380px;
    height: 500px;
    float: left;
    background-color: rgb(242,242,242);
}
.div3_a:nth-child(3){
    position: absolute;
    right: 34.5%;
}
.div3_a:nth-child(4){
    position: absolute;
    right: 0%;
}

.div3_b{
    width: 100%;
    height: 35px;
    position: absolute;
    top: 100%;
}
.div3_b div{
    float: left;
    width: 150px;
    height: 35px;
    border: 1px solid black;
}
.div3_b div:nth-child(1){
    position: absolute;
    left: 35%;
}
.div3_b div:nth-child(2){
    position: absolute;
    right: 35%;
}
.div3_b div a{
    color: black;
    position: absolute;
    top: 20%;
    left: 27%;
}

.div3_a span{
    border: 1px solid rgb(142,142,142);
    background-color: rgb(142,142,142);
    width: 100px;
    height: 30px;
    color: white;
    position: absolute;
    text-align: center;
    line-height: 2.2;
    font-size: 13px;
    z-index: 1;
}

.div3_a img{
    width: 380px;
}

.div3_a_1 h4{
    position: relative;
    top: 50px;
    left: 40px;
}
.div3_a_1>div>div:nth-child(1){
    float: left;
    position: relative;
    top: 70px;
    left: 40px;
}
.div3_a_1>div>div:nth-child(2){
    position: relative;
    top: 70px;
    left: 100px;
}

.div3_a_1>div:nth-child(3){
    width: 300px;
    position: relative;
    left: 40px;
    top: 100px;
}

.div3_a_2 h4{
    position: relative;
    top: 50px;
    left: 40px;
}
.div3_a_2>div>div:nth-child(1){
    float: left;
    position: relative;
    top: 70px;
    left: 40px;
}
.div3_a_2>div>div:nth-child(2){
    position: relative;
    top: 70px;
    left: 80px;
}

.div3_a_2>div:nth-child(3){
    width: 300px;
    position: relative;
    left: 40px;
    top: 100px;
}

#div3_a_3>div:nth-child(2){
    width: 80%;
    height: 20%;
    position: absolute;
    top: 10%;
    left: 10%;
}
#div3_a_3>div:nth-child(3){
    width: 80%;
    height: 20%;
    position: absolute;
    top: 32%;
    left: 10%;
}
#div3_a_3>div:nth-child(4){
    width: 80%;
    height: 20%;
    position: absolute;
    top: 54%;
    left: 10%;
}
#div3_a_3>div:nth-child(5){
    width: 80%;
    height: 20%;
    position: absolute;
    top: 76%;
    left: 10%;
}

#div3_a_3 a h4{
    color: black;
}
#div3_a_3 a div{
    position: relative;
    top: 3px;
    color: rgb(142,142,142);
}

